Hi ~ I'm not sure there's anything here that would pertain to tinnitis. If this Scuba Diving accident resulted in a Traumatic brain injury or something similar, you could try www.braintalkcommunities.org/
and go to the Traumatic Brain Injuries forum (TBI) They might be able to help you.
I hope you find what you're looking for. If that site can't help you, just type "tinnitis" in your search engine, and see what comes up. I'm sure you'll be able to find something. Best of luck and God bless! Hugs, Lee